Antenna



A ri 4, 1939. BERNDT 2,153,292

ANTENNA Filed July 18, 1936 INVENTOR WALTE ERNDT ATToRNEY II1 the arTangen1ent aooording to the inven tion, the suppression of the space radiation is alTeady provided foT by the high iron IZ1ast. t iS only the inaoouracy in tho zero place in the diagran1, oaused by the in1111enoe of the trave1 ing Waves, that is to be con1pensated foT by the auxniary antennasa I'11e curtentS in tho auxiHary antennas ore, however, Sman os oom pared With the cuTent in the Inast. 'The auxi1iary antennas are of shot length as coInpared With the length of the centTa1 antenno. Thoir distance fron1 the oentral antenna Inust 1ikeviSe be sman- It iS choSen pTeferab1y below so that a diagram vri11 be 0btaihed wh1eh comes s olose as possible to the cosine funotion at large veTtical angles.

vvhat is clainled is:

1. An antenna sySten1 having, in oonibinotion, a vertico1 radia ting element Whose length iS approxiInately one-half the length of the oo1 nlunication vauve, and n1eanS for eneTgizing said elenlent whereby theTe is produced a tfaveling wave conlponent therein, and IneanS ooITlpriSing another radiating eleInent fo1 produoing a Ta dia,tion field v711ioh iSn1axiInun1 at zero degreeS ond substantiany zeo at 90 With reSpect to the horionta1, v7hioh oonbines dth he radiotion fron1 sajd veTtioo1 Tadiating eienlent to con penSate for the distortion of the vertioa1 radiotion pattern by said traveHng Wave ooInponent.

2. An antenna systeIn coIn Tising a oentTa1 aerio1 having a length sobstontially equal to half the 1ength of the ooo1znunication vvave, and al pluroHy of odditiono1 Shorter veTioa1 aerials 1ocatod oroon soid oenTa1 oeria1 on a oiro1e Whose adius is onequarter the length of the oomnlunication Wave, soid oentral aeria1 and ad ditiona1 oeriols being so energized that the ra diotion fTon1 Soid additiona1 aeria1s oon1penSates fo' the eEeot of the troveling Wave oon1ponent on the verioo1 rodiotion patterT1 of said oentra1 ooL 3. '1e meod of o erating an antenna whose Tadiation pattem departs fron1 the calc11lated pat torn a11o to tho e1eots of the tTaveling vvave coInponont therein, Whioh conlprises produoing a ditod wave independently of said antenna of a, pTedetern11ned nlagnitude and phase Where by it cdmbTnoS vh the radiation 1'on1 Said aenn to ooT1penso1e fo1 `111e diStortion of the vertical rodlation pattern by said tralveling vvalve 

